Home – Home – Jornals – 2015 number 5

A two-step procedure for solving problems of robust control of dynamic plants with uncertainties is proposed. Plant dynamics is first subjected to robust correction by means of a high-gain control loop in accordance with a given reference model. Since the corrected plant model is now known, standard control methods are then used. This approach is implemented in a two-loop control system: the inner loop provides robust correction of a plant, and the outer loop is responsible for the achievement of the control objective.

We study pole placement in SISO linear control systems with low-order controllers is studied. A method for finding critical (including optimal and suboptimal) pole placement in closedloop systems is theoretically justified and demonstrated on an example. Using critical root diagrams and root polynomials, it is possible to analytically express the parameters of a suboptimal controller in terms of root coordinates, in particular, the real and imaginary parts of characteristic roots. The resulting algebraic equations and inequalities allow specifying the left-most shift of the pole placement domain and the greatest relative stability (possibly taking into account oscillation) without cumbersome calculations.

A problem of control of the motion of mobile robots with a differential drive in a leader-follower formation is considered. The proposed method of structural synthesis allow one to form control inputs for robots-followers only on the basis of information about the relative positions of the followers and the leader without using the absolute values of the spatial coordinates of the robots. The algorithm efficiency is confirmed by results of numerical experiments.

An approach is proposed for constructing an information-control system (ICS) for controlling the motion of mobile robots (MRs) of various types and purposes. This ICS consists of universal components with data exchange through interfaces independent of the MR hardware. The use of this system appreciably decreases the cost of the development of a new generation of mobile robots.

This paper gives brief descriptions of the distinctive features of the method of measuring radial and axial displacements of complex-shaped blade tips (employed in turbines) using a distributed cluster of single-coil eddy current sensors (SCECS) with a sensitive element (SE) in the form of conductor strips, known models of the electromagnetic interaction of SCECS SEs with the controlled and adjacent blades, and a measuring circuit (MC) with a cluster of two SCECSs designed for computational experiments. Results of experiments in the form of families of conversion functions (dependences of the equivalent inductances of SEs or digital codes at the MC output on the desired radial and axial displacements of the blade tip) and families of influence functions of adjacent blades on the equivalent inductances of the SE and the MC output codes are considered.

A problem of constructing a combined adaptive control system for periodic modes of a control-affine a priori uncertain nonlinear dynamic object is considered. At the stage of simulation modeling, the quality of the resulting control system is illustrated.

The error of measuring the capacity of semiconductor structures at a high frequency by an integrator-based measurement circuit is studied theoretically and experimentally. Relations derived for calculating this error allow one to choose the measurement circuit parameters correctly for particular conditions.

The simulation of vapor condensation on the water surface using the four-point potential for molecules is described. The parameters of the phenomenological model of vapor dissolved in water are reproduced as a result of microsimulation of the behavior of a cluster consisting of 55 molecules. Coefficient of sticking molecules on the water surface is calculated based on mechanical analogy with an elastic blow. The consent of microsimulation parameters with the parameters of the phenomenological model is obtained.

Results of observation of generation of aerosol particles and drops in mixtures of saturated water vapor with air and molecular gases are described in the paper. The kinetics of the aerosol and drop generation was studied in the absence and under impact of monokinetic beam of electrons on the gas mixture with supersaturated water vapor, formed in the process of the controllable pressure unloading of the prepared gas mixture from a spherical chamber of 1.4 m in diameter to vacuum reservoir of 40 m³ in volume. The kinetics of generation of aerosol particles and drops was recorded by the method of laser beam (drop) small-angle scattering and with the help of aerosol spectrometer (particle). Experimental results show significant dependence of generation of drops and particles on the impact of ionizing radiation. Three-dimensional computer simulation of the process of supersaturated water vapor condensation on ions by methods of Boltzmann lattice equations (LBE) and molecular dynamics (MD) describes qualitatively the obtained experimental results.

Peculiarities of multiple filamentation of femtosecond laser pulses with gigawatt-level power in optical glass are considered. We analyze experimentally and by numerical simulations the fine structure of the plasma region accompanying light filaments and being created upon photoionization of dielectric. For the first time, the dependence of the number, position, and length of the individual generations of plasma channels on the laser energy is investigated. The role of pulse refocusing events in the formation of plasma region is discussed.

Problem of allowance for a polarization in statistical simulation of satellite imaging of the Earth surface in the optical wavelength range is considered. It is demonstrated that neglecting the polarizing properties of radiation can lead to significant errors in the reconstructed reflection coefficient of weakly reflecting surfaces.

In April, 2011, at Northern Hemisphere midlatitudes, a long-term anomalous decrease of the total ozone content was recorded over a number of regions, attributed to echoes of large-scale Arctic ozone anomaly, observed in March. In this paper, we showed that stratospheric ozone destruction over Tomsk during that period was caused by eruption of Indonesian volcano Merapi in November 2010. NOAA HYSPLIT model was used to analyze the motion of air masses in the lower stratosphere on the way from coordinates of volcanic ejection from the moment of eruption until late April. It was found that air masses, containing volcanic aerosol, came to the Northern Hemisphere midlatitudes in late March 2011, in agreement with high aerosol content recorded in the stratosphere over Tomsk during that period. Based on analysis of temperature and ozone anomalies in the stratosphere over Tomsk, we showed that they manifested themselves by the volcanic soot present in aerosol composition.

The absence of explicit information on the “in situ” vertical distribution of optical characteristics of atmospheric aerosol is a common situation because of the complexity and high cost of environmental monitoring from aircraft. The paper presents estimates of effects of stratification of the atmospheric optical characteristics on the downward scattered radiation measured by a sun photometer at the surface of the Earth in two basic configurations - in the solar almucantar and the solar principal plane. The assessments were made on the basis of numerical experiments using the parameters which describe both background (areas with low anthropogenic loading) and extreme atmospheric situations (urban smog, dusty haze over the land, dust cloud above the water surface). It is shown that in the visible region of the spectrum beyond radiation absorption by the oxygen, ozone, water vapor, and nitrogen dioxide the stratification of the atmospheric optical characteristics has no significant effect on the sky radiance in solar almucantar, but in the solar principal plane it plays a significant role. The vertical variation of the aerosol extinction coefficient is the main factor. Using the simplified vertical profiles, in particular, the exponential distribution of the extinction coefficient, the error in the radiance calculation can be significantly reduced.

In the current work, the result of an investigation of temperature effect of smoke aerosol in the summer season over the central part of Yakutia during the period 2004−2014 are presented. The data of ground-based and satellite measurements and also of climate models NCEP/NCAR and ERA-Interim, which are based on regular meteorological observations and aerological and satellite informations are used. It is first showed that a disturbance of atmosphere by aerosol particles which is caused by heat sources of forest area lead to a decrease of solar radiation flow, and, in the presence of a negative phase of upward longwave radiation, a surface air temperature drop is observed.

A set of photoacoustic spectrometers in order to study the weak aerosol and molecular absorption of laser pulses by atmospheric air in UV, Visible and near infrared spectral regions is designed. The common element of spectrometers is a photoacoustic detector with a temporal resolution of signals and a built-in acoustic hub consisting of two parabolic mirrors. The detector is characterized by a high sensitivity (minimum measured value of the absorption coefficient reaches ~ 10^–9 cm^–1 at a laser beam radius of 1.5 mm and a laser pulse energy of 50 mJ) and by lack of background signals associated with the absorption of radiation at the inner surface of the photoacoustic cell. Some results of measurements of non-selective molecular and aerosol absorption in gases and air, including non-linear absorption of high-power femtosecond laser pulses are presented.

The status of the ground-based microwave radiometry in view of determining atmospheric temperature and moisture profiles, water vapor, cloud liquid, and rainfall intensity is discusses. Approaches to solving inverse problems of microwave radiometry of the atmosphere, the results of experimental research of atmospheric water vapor and cloud liquid with the help of dual-frequency radiometer are described. The promising directions of the practical application of the method and means of microwave radiometry of the atmosphere are formulated.

November 17, 2015 was 70 years head of the editors of the journal "Atmospheric and Ocean Optics' Staline Borisovna Ponomareva.

The article presents an analysis of the current situation in the Arctic zone of the Russian Federation by identifying factors that impede the sustainable economic growth of the macro-region, obstruct the implementation of investment policies, and affect the level of economic competitiveness. A special focus is put on an integrated approach to the determination of the macro-region's status, its role in the system of socio-economic development, strategic planning, not only in ensuring the national interests of our country and global competitiveness of Russia in the Arctic, but also in practical forecasting. In addition, we analyze the contemporary experience of state regulation for the development of polar areas in the USA and Canada. The article provides suggestions for further improving the system of strategic planning documents aimed at implementation of the state policy of Russia in the Arctic.

The article examines the main sources of Russia's federative statehood and its modern features. We analyze its development in connection with the general evolution trends of the idea and state practice of federalism in the today's world. It is crucial that federative relations in Russia continuously improve, as they are one of the prerequisites for the sustainable economic development of the country and its regions and are necessary to achieve the country's goals in the economic and social spheres. The research methodology is based on the analysis of the main formation stages that federative relations in Russia are passing through. We focus on the fact that legal and institutional foundations of Russian federalism are closely related to the consolidation of its economic base, primarily through the improvement of the Russian model offiscal federalism. The article describes both finished and unfinished tasks associated with the transformation of the economic and legal framework of federative relations, which we define as the main prospects for the Russian federative reform. We have concluded that the federative reform cannot be considered complete. It should be continued, but based on a clear target-setting principle and built in close relationship with other key areas of social and economic transformation in Russia.

The article analyzes the reasons and consequences of deindustrialization in Russia and advanced economies. Here we define the prominent features of technological and organizational basis for a new industrialization (robotic automation, additive technologies, new materials, big data, agent-oriented modeling, cognitive systems, distributed and cloud computing, the production differentiation, unmanned technologies, etc.). The emphasis is put on the characteristics of reindustrialization processes in Russia and how they are slowed down by the need to create internal mechanisms for maintaining technological and economic progress.

The article deals with the problem ofestimation ofdiversifying the economy at the level of individual regions. Diversification is one of the strategic objectives of Siberia's development. In order to reach this goal, it must be broadcasted to the level of measurable indicators. To measure and estimate the diversification of the regional economy, scholars put into practice various indicators (variations of Herfindahl-Hirschman Index, Entropy Index, etc.). Different indicators reflect the variety of characteristics in the diversification processes. In this article, we compare and analyze the diversification of the economies in the regions of the Siberian Federal District in the period between 2008 and 2013. The study includes different diversification indicators that demonstrate divergence estimates for the various parameters, and identifies contradictory trends of diversification processes development in the regions of the Siberian Federal District. It is shown that there exists a connection between the diversification of the regional economy and its stability.

The article presents the findings of the research on interethnic relations in one of the largest regions of Russia. The paper shows the processes associated with the forms of socialization in a multinational state. It also presents the stance of those individuals who are intolerant to living in such a formation, as well as a social portrait of supporters and opponents of a multinational state. We consider the nature of relations with labor migrants' ethnic groups and state policy measures in this field. We determine the characteristics of interactions within the inner and outer circles, which are based on ethnicity. The article proves the presence of barriers to family relationships related to interethnic ones. The main elements of a potential ethnic conflict are described as follows: positions of participants, an image of an «enemy», and a subject of its development. Based on mapping of the region, we show the locations of tension in interethnic relations. The study results clearly define four centers of such tension. Two of them are on the borders with other two Russian federal subjects. It is fraught with a potential contention, its growth and transformation into an interregional conflict. The feasibility of this risk is confirmed by the intensity of particular organizational activities in social media.

The article suggests introducing a scientific term «village-forming agricultural enterprise)) as applied to agricultural organizations located in non-diversified rural areas. We carried out an analysis of statistical data characterizing the dynamics of social and economic development of rural municipal districts of Perm Krai in comparison with the average regional level. The analysis has revealed that Perm Krai municipal districts where a significant amount of village-forming agricultural enterprises was eliminated take the lowest places in dynamics ratings for the registered unemployment level, migration population decline, reduction of the working-age people per pensioner, agricultural production, and budget balancing. We have concluded that the liquidation of village-forming agricultural enterprises is a prime factor for the degradation of the socioeconomic sphere in rural areas; it aggravates their depression. To increase the attractiveness of rural labor and preserve human capital in agricultural production, we propose to abolish the tax on individual agricultural producers. The article proves the necessity to develop a mechanism that would transfer abandonedfields and timberland ofagricultural designation into forest reserve lands. In order to increase employment and reduce unemployment, it is necessary to organize a publicly funded community service that would take care of forests in these areas. To provide opportunities for labor mobility for the people who find workplaces outside depressed non-diversified rural areas, we propose to improve the organization of intra-settlement pubtic transport. To increase employment, we suggest supporting the development of non-standard employment forms.

The article presents a study of employers' opinion on a range of qualities that a university graduate should possess, as well as on the forms of university-employer interaction. We collected relevant information using a method of unstructured interview. The experts were employers who represented various activities and enterprises of different forms of ownership from Kemerovo Oblast. The research has identified the qualities which, in experts' opinion, a university graduate should have, but are built up insufficiently by universities. Among the growth options for the cooperation between educational institutions and employers' enterprises, the experts particularly suggest changing the approaches to arranging and conducting various types of practical training. The experts also note the need to strengthen the feedback between universities and employers. The research results will be used in the development of educational and training materials, which will help focus on the applicability of university training in accordance with the Federal State Educational Standards.

In this article, the author investigates the opportunities and limitations of the cluster approach for addressing challenges concerned with the rapid development of innovative entrepreneurship in regions. Не analyzes the phenomenon of spatial innovation cluster as a form offocal spatial integration of geographically close companies and organizations that perform different functions (from research and training to production and transportation), but unified by their voluntary participation in scientific and engineering processes. It results in a high-technology product created by joint efforts of all participants in this specially organized cooperation. The article also considers prerequisites, conditions and consequences related to the use of spatial clusters. It clarifies the meaning, useful effects, requirements and lifecycle phases of the organizational form under analysis. The author emphasizes a crucial role of regional authorities in spatial clustering; he assesses the existing tasks and measures of state support. The article gives a general characterization for the implementation of the government program aimed at developing and supporting innovation clusters in the Russian regions.

After years of reforms, the public railway management entity JSC Russian Railways is in a setting known as the institutional trap. The assumption that other mechanisms of the Russian economy should synchronously transform with this key infrastructural area was proved to be wrong. A functional geographical model of railway management was replaced by a «super centralized)} management model by type of activity. Russian Railways is now a holding that controls rail transport using hierarchy lines from the corporate center to the primary functional unit of the railways. In this paper, we analyze the efficiency of railway management based on new models and ways to escape out of institutional traps. We suggest approaches to developing the structural reform of Russian rail transport.

Changes in population dynamics point out the existence of unresolved socio-economic problems in settlements, especially in monotowns of different regions. The article proposes quantitative models and methods of historical-geographical analysis of time series data on the population that allow us to assess the living conditions and the quality of decisions made. The calculations are centered around the determination of how hazardous life activities are, which is based on the demographic response to the impact of multi-level factors of the natural and socio-economic conditions. We compare this reaction in mo-notowns of Russia with a view to identifying transformational features attributable to the spatial organization of the territory over the last decade. The proposed method can be used for comparative analysis of data reflecting the response of a region to various types of exposure.

The article characterizes the hydroeconomic situation in Crimea. It is necessary to solve both the problems that have accumulated in the water industry and the new ones emerged from the Ukrainian government's political decisions as a reaction to the reunification of Crimea with Russia. We describe the socio-economic and environmental impacts of a deliberately created water supply shortage. In this paper, we analyzed the ways to ease hydroeconomic tensions and related problems and examined premium water supply measures in Crimea and their implementation results, as well as development programs for the region. The study showed that by redistributing local water resources (river runoff and groundwater) over the territory, the government can ensure the supply of drinking and domestic water in Crimea. However, the region still experiences a problem with agricultural water since it does not have resources sufficient to develop irrigation farming. Large reserves for increasing water resources arise from a reduction of their losses (in housing and communal sector, and during land reclamation) and rational water use (especially by reducing/eliminating the use of clean drinking water for technical needs). We believe that the major way to decrease water shortage and satisfy the needs of agriculture and industry is to desalinate seawater. International experience proves this water supply method is efficient.

The article considers environmental problems arising from the hydrocarbon production by fracking. It is shown that almost everywhere shale gas and tight oil are being extracted without a preliminary research on the environmental health, which, in its turn, does not allow recognizing ecological deprivation associated with unconventional hydrocarbon resources deve-op-ment. We dramatically lack the scientific knowledge required to assess potential risks of pollution. The declared ecological advantage provided by shale gas flaring versus coal and oil production is groundless. The obtained findings point out the necessity to examine local conditions when assessing the environmental impact of fracking. The reason is that the effects vary by region. In a similar way, the technology and extraction practices applied at a certain deposit will not essentially be applicable at another one. The authors believe that the antipodal environmental impact assessments of shale oil and gas extraction not only reveal the need for serious scientific research in this area, but also expose the importance of studying the past experience in order to manage the newly emerging environmental risks.

The article deals with the institutional and real-economic restructuring of industry in the former GDR based on the transformation of society. It shows how the country overcame the difficulties, what were the effects of a transformational crisis and consequences for the property relations. We also discuss the arranged measures aimed at reviving economic growth and the restructuring of industrial production related with the reindustrialization. To analyze the relationship between the institutional restructuring and its impact on the real economy, we use economic statistical methods. The restructuring of institutions has defined the vector of development for the East German industry, which is stipulated by its integration into the all-German economic system but has a very limited potential for growth and catching-up development. The region is currently much less behind West Germany but still not at the same level. The performance of the East German manufacturing industry accounts for about 63% of the West German one, and its increase has slowed down.

The article stresses that foreign public policy literature is focusing on interdependences among producing, expanding and impacts of knowledge. The author uses a complex approach, considering the interrelation of production, transfer and the use of knowledge, setting these phenomena into spatial frames and linking them with development policy. The reason of this specific focus is supported by recent political ambitions in the EU countries to strengthen the role of local economic development aimed at decreasing regional inequalities. The author outlines the theoretical frames of knowledge-based governance and development, like the urban regime theory, local knowledge, and regional innovation theories. Based on her own empirical research experiences, the author introduces the main characteristics of the Hungarian local government system which tends to be limited in its scope and competences in local development due to the legislation in the last years referring. The paper concludes that the European, so-called place-based development policy cannot be implemented in this very centralized governance context.

The subject of this study is mammoth fauna resources in Arctic regions of the Russian Federation, including the bone-bearing locality in the northern part of the Republic of Sakha (Yakutia). The article estimates the quantity offossil mammoth ivory of the Northern-Yakut bone-bearing province. It also justifies the creation of federal law on the rational use ofmammoth fauna as an exclusive geocryogenic natural resource traditionally used by indigenous peoples of the North of Russia. We present proposals for inclusion of fossil mammoth ivory in the All-Russian Classifier of Mineral Resources and Subsoil Water.

Adsorption of aliphatic sulfide on the faces of a 1.4x1.4x2.1 nm anatase nanoparticle of the stoichiometry Ti₁₁₄O₂₂₈ with ideal (001) and (100) faces are considered in this work. Molecular adsorption on the (001) face proceeds with the enthalpy varying from -6 kcal/mol to -38 kcal/mol by coordinating the sulfide sulfur atom to titanium and oxygen atoms, with the most exothermic adsorption occurring on atoms of the edges between (001) and (010) or (100) faces. Molecular adsorption on the (100) face proceeds with the enthalpy varying from -18 kcal/mol to -30 kcal/mol by coordinating the sulfur atom to oxygen atoms or simultaneously to oxygen and titanium atoms. In molecular adsorption complexes the S-Ti coordination bond length is 2.56-2.69 Å and the S-O bond length is 2.35-2.57 Å. Dissociative adsorption is observed on the (100) face and proceeds with the enthalpy up to -23 kcal/mol by coordinating the thiyl group to titanium and oxygen atoms and the ethyl group to surface oxygen atoms.

The electronic energy spectrum of the crystal and its sublattices of the crystalline a-phase of zinc chloride, the density of states, the total and deformation density of the charge distribution of valence electrons are calculated from the first principles using the density functional method. Optical vibrational modes are also calculated.

A two-parameter molecular descriptor is proposed in the QSPR model. It relates the ionization energies of molecules with topological indices and integrated oscillator strengths. Integrated oscillator strengths are obtained from electron spectroscopy data in the UV and visible spectral ranges. The regularities obtained are confirmed by the statistical processing of the data by multiple regression analysis methods in series of 1,4-naphthoquinone, 1-oxyanthraquinone, and 1-(4- tret-butylphenoxy)-9,10-anthraquinone derivatives.

Based on the full optimized molecular geometric structures at the B3LYP/cc-pVTZ level, a new designed compound 5-nitro-2-nitratomethyl-1,2,3,4-tetrazole is investigated in order to look for high energy density compounds (HEDCs). The IR spectrum, the heat of formation (HOF), and frontier molecular orbitals are predicted. The detonation velocity and pressure are evaluated using Kamlet-Jacobs equations based on the theoretical density and condensed HOF. The bond dissociation energies (BDEs) and bond orders for the weakest bonds are analyzed to investigate the thermal stability of the title compound. The results show that the O ₁-N ₆ bond is the trigger bond. The crystal structure obtained by molecular mechanics belongs to the Pna 2 ₁ space group with lattice parameters Z = 4, a = 13.7565 Å, b = 12.4737 Å, c = 4.3445 Å.

A newly synthesized Schiff base 3,3'-dihydroxy-4,4'-[4,4'-diphenylmethanebis(nitrilomethylidyne)]-bis-phenol is characterized experimentally. Also, the geometry optimization for the tautomers, tautomerism and assignment of the IR bands and NMR chemical shifts of the Schiff base were performed using the DFT method. Good consistency between the theoretical and experimental results confirms the validity of the optimized geometry. Geometries of four possible tautomers are fully optimized. None of them has a planar structure, but each of the benzene rings is in a separate plane. In the most stable tautomer L1, the phenolic protons are engaged in the intramolecular-hydrogen bond with the azomethine nitrogen atoms. Tautomerization of L1 can occur in two different pathways which are computationally studied using DFT and the Atoms In Molecules (AIM) analysis. Both pathways have the same barrier energy.

Random sampling analysis on the molecular surface (RASMS) is used to describe the chemical structures of 35 HEPT derivatives as anti-HIV drugs. Here a quantitative structure activity relationship (QSAR) model is built by multiple linear regression (MLR). The estimation stability and prediction ability of the model are strictly analyzed by both internal and external validations. The correlation coefficients of the established MLR model, leave-one-out (LOO) cross-validation, and predicted values versus experimental ones of external samples were r ² = 0.851, = 0.746, and r ²(test) = 0.815 respectively. The satisfactory results show that RASMS can express the information related to the biological activity of HEPT derivatives.